I have a syncthing connection between 2 nodes that are also on a shared zerotier network. This appears like a special ethernet device with a network that tunnels between sites.
Syncthing quickly discovers that the 2 nodes can talk via zerotier and makes connections like this:
(the tooltip says this is a tcp_server connection)
This connection works fine and so Syncthing is correct to use it, however, since that tunnel is encrypted it is slower than a direct TCP connection over the internet.
Is there a way to specify that some network interfaces should be preferred over others?
If not can I blacklist that zerotier network device?